Search results for "Note"
showing 10 items of 10709 documents
Raman spectral identification of phase distribution in anodic titanium dioxide coating
2017
Growing need for cleaner environment and energy production has brought about a hunt for perspective materials. One of such perspective materials is titanium dioxide (TiO2, titania) due to its chemical stability and photocatalytic properties. Titania can be synthesized through many methods but anodization process is one of the prevailing methods to produce high active surface nanostructured titania. Various anodization electrolytes produce different polymorphs of TiO2. Uniform phase distribution on the surface is crucial for higher photocatalytic activity. In this research, the influence of two electrolytes on polymorph phase distribution of TiO2 was investigated. Phase distribution correlat…
WO 3 as Additive for Efficient Photocatalyst Binary System TiO 2 /WO 3
2021
The financial support provided by Scientific Research Project for Students and Young Researchers No. SJZ/2018/9 implemented at the Institute of Solid State Physics, University of Latvia is greatly acknowledged. Institute of Solid State Physics, University of Latvia as the Center of Excellence has received funding from the Euro-pean Union’s Horizon 2020 Framework Programme H2020-WIDESPREAD-01-2016-2017-TeamingPhase2 under grant agreement No. 739508, project CAMART².
Anomāliju noteikšana ELK Stack
2020
Ingas Kauliņas maģistra darba mērķis ir izpētīt ELK stack un Elastic SIEM uzbūvi un komponentes, veikt to salīdzinājumu ar citiem risinājumiem SIEM darbību veikšanai un izveidot ZZDats piemērotu risinājumu anomāliju noteikšanai ELK stack, ko varētu pielietot SIEM funkciju veikšanā. Mērķa sasniegšanai tika izpētītas dokumentācijas Elastic produkiem, dokumentācija Humio sistēmai, padziļinātāk aplūkota anomāliju noteikšana, Elastic SIEM, Humio, Oracle shēmā un mašīnmācīšanās pielietošana anomāliju noteikšanā, kā arī veikti secinājumi par izstrādātā risinājuma sniegtajām priekšrocībām. Darba gaitā, padziļinātāk pētot anomāliju noteikšanu izvēlētajās sistēmās, autore saskārās gan ar plusiem gan …
Composition and antimicrobial activity of the essential oil of Achillea falcata L. (Asteraceae).
2005
The composition of the essential oil from aerial parts of Achillea falcata L. (Asteraceae) growing wild in Lebanon was analysed by GC and GC–MS; 58 compounds, representing 94.4% of the oil, were identified. Isomers of the cyclobutane ethanol, 1-methyl-2-(1-methylethenyl), grandisol (21.4%) and fragranol (16.8%) were the main components of the oil. Also abundant were artemisia ketone (5.2%), terpinen-4-ol (4.5%) and 1,8-cineole (4.0%). The essential oil shows inhibitory activity mainly against Gram-positive bacteria.
Chemical composition, antioxidant and anticholinesterase activity of the essential oil of algerian cachrys sicula L
2021
In this work, in order to explore a new Algerian medicinal plant used in traditional medicine, the essential oil of the leaves of Cachrys sicula L. (Apiaceae) collected from Algeria, obtained by hydrodistillation, was analyzed by GC/MS. Thirty-two compounds were identified accounting for 98.6% of the total oil, which is characterized by a high content of monoterpene hydrocarbons (74.8%). The main constituents of the essential oil were β-pinene (17.9%), sabinene (17.8%), myrcene (12%), and α-pinene (11.4%). In vitro antioxidant activity of the essential oil was assayed by three methods, namely ABTS•+, metal chelating, and DPPH• assays. The antioxidant activity of the oil was higher in the AB…
In Vitro Antioxidant Activity and In Vivo Topical Efficacy of Lipid Nanoparticles Co-Loading Idebenone and Tocopheryl Acetate
2019
Idebenone (IDE) is a strong antioxidant that has been proposed for the treatment of skin disorders, including skin ageing. Unfavorable physico-chemical properties make IDE a poor skin permeant where effectiveness could be improved by its loading into suitable delivery systems such as solid lipid nanoparticles (SLN) and nanostructured lipid carriers (NLC). In this work, we designed novel IDE-loaded NLC containing tocopheryl acetate (VitE) as a liquid component to obtain a synergic effect between IDE and VitE. The resulting NLC showed small particle sizes (24&ndash
Encapsulated Limonene: A Pleasant Lemon-Like Aroma with Promising Application in the Agri-Food Industry. A Review
2020
International audience; Limonene, mainly found as a major component in Citrus spp., has been proven to possess a valuable potential as sustainable replacement to synthetic pesticides and food preservatives. This review intends to give a clear overview of the principal emerging applications of limonene in the agri-food industry as antimicrobial, herbicidal and antioxidant agent. To successfully use limonene in a greener agri-food industry, its preservation had become a top concern for manufacturers. In order to elucidate the most efficient and sustainable manner to encapsulate limonene, the different techniques and materials tested up to the present are also reviewed. In general, encapsulati…
Politraumu pacientu aprūpes organizācija lokālās slimnīcas Neatliekamās medicīniskās palīdzības nodaļā
2019
Bakalaura darba tēma – “Politraumu pacientu aprūpes organizācija lokālās slimnīcas Neatliekamās medicīniskās palīdzības nodaļā”. Izvēlētās tēmas aktualitāti nosaka tas, ka katru gadu pasaulē un arī Latvijā pieaug traumu skaits, kuras tiek klasificētas kā politrauma. Ja politraumu guvušais pacients atrodas tālu no Rīgas un ir tik kritiskā stāvoklī, tad viņš tiek nogādāts tuvākajā reģionālajā vai lokālajā slimnīcā. Diemžēl citās slimnīcās, jo īpaši ārpus Rīgas trūkst nepieciešamo speciālistu. Tāpēc ļoti svarīgi noskaidrot, kāda ir aprūpes organizācija politraumas gadījumā, ja pacients tiek stacionēts lokālās slimnīcas NMP nodaļā. Darba autorei nav datu par līdzīgu pētījumu esamību Latvijā un …
Paternitātes noteikšanas ar trīspusēju paternitātes atzīšanas iesniegumu un paternitātes apstrīdēšanas problemātika.
2021
Autores izvēlētā bakalaura darba tēma ir “Paternitātes noteikšanas ar trīspusēju paternitātes atzīšanas iesniegumu un paternitātes apstrīdēšanas problemātika”. Mūsdienās, Latvijas normatīvie akti paredz vairākus variantus, kā noskaidrot bērna izcelšanos, kas būtiski ir atvieglojis iespēju arī bioloģiskajam tēvam atzīt savu paternitāti bērnam. Normatīvie akti šobrīd skaidri paredz, ka katram bērnam ir tiesības apzināties savu izcelšanos, kā arī tiesības uz savu identitāti. Bakalaura darba mērķis ir izpētīt paternitātes noteikšanas ar trīspusēju paternitātes atzīšanas iesniegumu izmantošanas iespējas Latvijā, tā regulējumu esošajos normatīvajos aktos un esošās problēmas, kuras ir nepieciešama…
Chromogenic Detection of Aqueous Formaldehyde Using Functionalized Silica Nanoparticles
2016
Silica nanoparticles functionalized with thiol reactive units and bulky polar polyamines were used for the selective colorimetric detection of formaldehyde. The reaction of thiols groups in the nanoparticles surface with a squaraine dye resulted in loss of the pi-conjugation of the chromophores, and the subsequent bleaching of the solution. However, when formaldehyde was present in the suspension, the thiol-squaraine reaction was inhibited and a chromogenic response was observed. A selective response to formaldehyde was observed only when the thiol and polyamine groups were anchored to the silica surface. The observed selective response was ascribed to the fact that bulky polyamines generat…